1. The product is made of ultra-light alloy, very strong, light, and rust-proof. 2. The valve stem has a detachable valve core, which can be filled with sealant, which is convenient for installation and use. 3. Equipped with detachable tools, it is convenient and quick to install. 4. Function: a one-way valve for charging and discharging the gas in the tire and maintaining the air pressure inside the tire 5. Scope of application: most bicycles with tubeless rims and wheels 6. Installation position: tire valve 7. Installation method: screw-on 8. Material: aluminum alloy 9. Stem length: 40mm 10. Total valve length: 55mm 11. Composition: French valve x 2 A-shaped plastic wrench x 1